Electron in a sample of `H-` atoms make transitions from state `n=x` to some lower excited state. The emission spectrum from the sample is found to contain only the lines belonging to a particular series. If one of the photons had an energy of `0.6375 eV`. Then find the value of `x. [" Take " 0.6375eV=(3)/(4)xx0.85eV]`.

Electrons in a sample of H-atoms make transition from state n=x to some lower excited state. The emission spectrum from the sample is found to contain only the line belonging to a particular series. If one of the photons has an energy of 0.6375 eV . Find the value of x. ["Take" 0.6375 eV = 3/4 xx0.85 eV]

The electron in a hydrogen atom at rest makes a transition from n = 2 energy state to the n = 1 ground state. find the energy (eV) of the emitted photon.

The electron in a hydrogen atom at rest makes a transition from n = 2 energy state to the n = 1 ground state. find the energy (eV) of the emitted photon.

Hydrogen like atoms (atomic number = Z ) in a sample are in excited state with principal quantum number n. The emission spectrum of the sample has 15 different lines. The second most energetic photon emitted by the sample has energy of 27.2 eV . Find Z.

If electron make transition from 7^(th) excited state to 2^(nd) state in H atom sample find the max. number of spectral lines observed.

If electron make transition from 7^(th) excited state to 2^(nd) state in H atom sample find the max. number of spectral lines observed.

In a sample of H-atoms in ground state electrons make transition from ground state to a particular excited state where path length is 5 times de Broglie wavelength , electrons make back transition to the ground state producing all possible photons. If photon having 2nd highest energy of this sample can be used to excite the electron in a particular excited state of Li^(2+) ion then find the final excited state of Li^(2+) ion .